Implement PaintWorkletGlobalScope#registerPaint() for the CSS Paint API

third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp

Index: third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
diff --git a/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp b/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..53b227aff9afb4057ff4babf6f190fb619186954
--- /dev/null
+++ b/third_party/WebKit/Source/modules/csspaint/CSSPaintDefinition.cpp
@@ -0,0 +1,38 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/csspaint/CSSPaintDefinition.h"
+
+#include "bindings/core/v8/ScriptState.h"
+
+namespace blink {
+
+namespace {
+
+static void clearHandle(const v8::WeakCallbackInfo<ScopedPersistent<v8::Function>>& data)
+{
+    data.GetParameter()->clear();
+}
+
+} // namespace
+
+PassRefPtrWillBeRawPtr<CSSPaintDefinition> CSSPaintDefinition::create(ScriptState* scriptState, v8::Local<v8::Function> constructor, v8::Local<v8::Function> paint)
+{
+    return adoptRefWillBeNoop(new CSSPaintDefinition(scriptState, constructor, paint));
+}
+
+CSSPaintDefinition::CSSPaintDefinition(ScriptState* scriptState, v8::Local<v8::Function> constructor, v8::Local<v8::Function> paint)
+    : m_scriptState(scriptState)
+    , m_constructor(scriptState->isolate(), constructor)
+    , m_paint(scriptState->isolate(), paint)
+{
+    m_constructor.setWeak(&m_constructor, clearHandle);
+    m_paint.setWeak(&m_paint, clearHandle);
+}
+
+CSSPaintDefinition::~CSSPaintDefinition()
+{
+}
+
+} // namespace blink